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I could help myself. At least this works with my testing programms.
  1. I need to wait for the $pid instead of -1
  2. I can check $? for the exit status
  3. I need to check the result of waitpid for >0 instead of == -1
So now the relevant code section reades likes this:
if ($pid == 0) { # child print " child: exec\n"; exec("$prg arguments"); exit; } else { # parent print " parent: wait\n"; my $time = time(); my $kill_flag = 1; while (time() - $time < $timeout) { sleep 1; my $kid = waitpid($pid,WNOHANG); my $exit_value = $? >> 8; if ($kid > 0) { $kill_flag = 0; $return_code = !$exit_value; last; } } if($kill_flag) { kill(9, $pid); $return_code = 0; } } return $return_code;
Thanks for reading anyway :-)

Regards... Stefan
you begin bashing the string with a +42 regexp of confusion

In reply to Re: YA fork() question: catching runaway and erroneous processes by stefan k
in thread YA fork() question: catching runaway and erroneous processes by stefan k

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    [stevieb]: one of my long-running Perl procs crashes with a segfault (because it wraps C code) is crashing after an hour or so... seeing if wrapping the cli call with valgrind will produce something useful

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